鉄塔-送電線系の地震応答に及ぼす碍子の振動の影響

抄録

This paper presents effects of vibrations of transmission insulators on towers and lines subjected to earthquake. Free vibration analyses of transmission line and insulators are made by using the method of modal analysis, which adopts individual modes of a suspended line and suspended insulators. The theoretical results agree well with the experimental ones of dynamic tensions in a transmission line and insulators model excited by periodic longitudinal displacements at one end. Finally, as a result of seismic response calculations of towers, lines and insulators systems in two cases, it is shown that they are about equal or larger than the seismic responses of lines and towers considering the insulators as an added mass, but smaller than those of a single tower.